Honda Civic Service Manual page 292

8. Check for continuity between ECM connector
terminals 46 and body ground.
ECM CONNECTOR A 131P}
Wire side ol lemale terminals
ls there continuity?
YES-Repair open in the wire between the Ay'F
sensor (Sensor 1) and the ECM (416).1
NO-Repair open in the wire between the Ay'F
sensor (Sensor 1) and the ECM (46).1
Substitute a known-good Ay'F sensor (Sensor 1) and
recheck.
ls DTC P1157 indicated?
YES- Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 1 1-6). if the symptom/indication
goes away with a known-good ECM, replace the
original ECM. !
NO- Replace the Ay'F sensor {Sensor 1). !
9 .
DTC Pl158: Ay'F Sensor (Sensor 1) AFS -
Terminal Low Voltage
1 . R e s e t t h e E C M ( s e e p a g e 1 1 - 4 ) .
2. Start the engine.
ls DTC P1158 indicated?
YES Go to step 3.
NO-lntermittent failure, system is OK at this time
Check for poor connections or loose termanals at
the Ay'F sensor (Sensor 1) and at the ECIM I
3. Turn the ignition switch OFF.
4, Disconnectthe Ay'F sensor (Sensor 1) 4P connector,
a n d E C M c o n n e c t o r A ( 3 1 P ) .
5. Check for continuity between ECM connector
t e r m i n a l 4 1 6 a n d b o d y g r o u n d .
ECM CONNECTOR A (31P)
ls thete continuity?
YES-Repair shon in the wire between the A,/F
s e n s o r ( S e n s o r 1 ) a n d t h e E C M ( A 1 6 ) . 1
NO Go to step 6.
' c o n t d )
Wire side oJ female terminals
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